This is the Realm of Simply Beautiful

Room for totally bored people to hang. Open discussions.
Apr 23, 2020 03:54
People are knowingly assaulted with false information on a daily basis. This, coupled with unbelievably divisive rhetoric, has pushed people towards the extreme ends of the political spectrum, preventing anything from getting done.
Apr 23, 2020 03:48
This extends to our ability to respond to disasters.
Apr 23, 2020 03:47
@user21820 In the last decade, The American Media (primarily conservative media in this particular situation) has put the U.S. in a paralytic state.
Oct 8, 2019 17:20
absolutely. I had forgotten how much I enjoy our conversations. I'll make an effort to start hopping back in more frequently.
Oct 8, 2019 17:14
I'm not super comfortable relaying the most interesting compounds I have synthesized because of the nature of the case I spoke to you about.
Oct 8, 2019 17:12
yes I normally wind up synthesizing my own reagents too instead up buying htem, so can be time consuming
Oct 8, 2019 17:10
Complex in structure or in the synthetic process?
Oct 8, 2019 17:08
chloral hydrate you can get by bubbling chlorine gas through ethanol
Oct 8, 2019 17:08
laughing gas is another one
Oct 8, 2019 17:07
That was the first compound that was used to put people to sleep for surgery, but was replaced by less flammable ones
Oct 8, 2019 17:06
diethyl ether I've had a lot of fun with
Oct 8, 2019 17:06
but they're not OTC, they're just not used anymore, so nobody ever got around to making them illegal
Oct 8, 2019 17:06
I have actually
Oct 8, 2019 17:04
yes
Oct 8, 2019 17:04
Its the RX only ones that get you into trouble
Oct 8, 2019 17:04
In texas and US I would expect so
Oct 8, 2019 16:57
Exploiting metathesis reactions works really well also.
Oct 8, 2019 16:56
several of the above methods*
Oct 8, 2019 16:55
Normally you will mix several of the above ones I listed
Oct 8, 2019 16:54
Most organic compounds in the solid state are crystalline
Oct 8, 2019 16:53
It can be less effective if the adulterant is really close in solubility to the product, but even then it still works wonderfully because of thermodynamic principles
Oct 8, 2019 16:50
sometimes you'll need to do a dual-solvent recrystallization if you can't find a single one that works
Oct 8, 2019 16:45
5. Filtration
Oct 8, 2019 16:45
4.) Extraction
Oct 8, 2019 16:45
3.) Distillilation
Oct 8, 2019 16:45
2.) Chromatography
Oct 8, 2019 16:44
Here are the basic methods of isolation and purification in chemistry:
1.) Recrystallization
Oct 8, 2019 16:41
anytime in lab the product is a crystal a recrystallization is performed. No exceptions.
Oct 8, 2019 16:40
the newly formed crystals will be OUTRAGEOUSLY less adulterated then the former ones
Oct 8, 2019 16:39
So bring the solvent to a boil, dissolve the maximum amount of your crude material in it, and then let it cool
Oct 8, 2019 16:39
2.) Your compound is soluble in it when it is hot
Oct 8, 2019 16:38
The correct solvent is the one that has the following properties:

1. Your compound is insoluble in it when cold
Oct 8, 2019 16:34
@user21820
Oct 8, 2019 16:34
@user
Oct 8, 2019 16:33
You can do that one without any equipment whatsoever!
Oct 8, 2019 16:33
In chemistry, recrystallization is a technique used to purify chemicals. By dissolving both impurities and a compound in an appropriate solvent, either the desired compound or impurities can be removed from the solution, leaving the other behind. It is named for the crystals often formed when the compound precipitates out. Alternatively, recrystallization can refer to the natural growth of larger ice crystals at the expense of smaller ones. == Chemistry == In chemistry, recrystallization is a procedure for purifying compounds. The most typical situation is that a desired "compound A" is c...
Oct 8, 2019 16:32
@user21820
Oct 8, 2019 15:04
Yes. Looks like she landed herself a very lengthy suspension
Oct 8, 2019 15:00
is namaste amy?
Oct 8, 2019 14:57
The Diagnostic and Statistical Manual of Mental Disorders (DSM), published by the American Psychiatric Association (APA), offers a common language and standard criteria for the classification of mental disorders. It is used, or relied upon, by clinicians, researchers, psychiatric drug regulation agencies, health insurance companies, pharmaceutical companies, the legal system, and policy makers together with alternatives such as the ICD-10 Classification of Mental and Behavioural Disorders, produced by the WHO.The DSM is in its fifth edition, the DSM-5, published on May 18, 2013. The DSM evolved...
Oct 8, 2019 14:56
It is arguably the most subjective area of medicine. In the US we have the DSM which helps some because it provides a more algorithmic mechanism of diagnosis
Oct 8, 2019 14:54
@user21820 I'm afraid I don't have anything further to offer in terms of a test for asbestos. If you are super concerned I suppose you could buy a carton of those surgical-like masks they sell at a pharmacy.
 

 Mathematics

Associated with Math.SE; for both general discussion & math qu...
Apr 12, 2020 17:53
@Astyx That question was unanswered. The one I was thinking of putting up uses the combinatorial argument where you determine the # of elements of certain orders in A5 and then use lagranges theorem to determine the possible sizes of subgroups and show that each possible normal subgroup would have to contain more elements than its order using the fact that if $H$ is normal to $G$ and gcd$(|x|,|G/H| = 1$ then $x \in H$.
Apr 12, 2020 17:44
Am I just awful at searching or is there actually no proof of A5's simplicity on this site. Want to make absolutely certain before I take the time to type one up
 

 CURED

For feedback/discussion/requests of Close/Undelete/Reopen/Edit...
Apr 12, 2020 08:49
0
Q: Analysis of prime gaps - are the following observations significant?

Malcan analysis of the gaps between the first 1000 prime numbers yields the following results: Gap 2k###Sum ## 2 35 4 40 6 44 8 15 10 16 12 7 14 7 16 0 18 1 20 1 We can then sum the...

 

  Logic

This room is meant for discussion about logic, including found...
Mar 14, 2020 16:42
@user21820 this is one of the slickest proofs of a theorem I've come across in awhile: en.wikipedia.org/wiki/Proof_of_Bertrand%27s_postulate
Mar 14, 2020 13:58
@user21820 well not really a math book. Introductory logic text that would be used in an intro to logic course that samples a wide # of topics comparable to the ones I listed.
Mar 14, 2020 01:34
@user21820 I lost my introductory logic text...wanted to get one as a gift for someone. I can't recall the author or title. Do you know any introductory logic texts that cover argumention and informal fallacies, syllogistic logic, statement logic, mills methods and causaulity, probabilistic reasoning, truth tables, etc?
 

­Trash

Where the trash goes.
Oct 8, 2019 11:09
I just don't want other people attempting that stuff. Accidents in chemistry are easy to make and have extreme consequences